These GBC Velobind Easy-Editing 4 Prong Reclosable Binding Spines are durable, slim and give your presentations a professional book-like finish. GBC Reclosable 4 Pin Velobind Spines make it easy to add or remove pages from your presentations and proposals. GBC 4-prong VeloBind Strips are sometimes called EVB strips and are designed to work with the GBC Electric Velobinder, GBC Desktop "Velobinder" system, GBC Velobind V100e, GBC Velobind V110e and GBC Velobind V50 systems.